:root {
            --primary-green: #2e7d32;
            --secondary-green: #4caf50;
            --accent-gold: #ff9800;
            --earth-brown: #795548;
            --sky-blue: #2196f3;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f5f5 0%, #e8f5e8 100%);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-green) !important;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
        }
        .nav-link {
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            color: var(--secondary-green) !important;
            transform: translateY(-2px);
        }
        h1, h2, h3 {
            color: var(--primary-green);
            margin-bottom: 1.5rem;
            font-weight: 700;
        }
        h1 {
            border-bottom: 3px solid var(--accent-gold);
            padding-bottom: 0.5rem;
            font-size: 2.5rem;
        }
        h2 {
            border-left: 5px solid var(--secondary-green);
            padding-left: 1rem;
            margin-top: 2.5rem;
        }
        h3 {
            color: var(--earth-brown);
            margin-top: 2rem;
        }
        .lead {
            font-size: 1.2rem;
            color: #555;
            font-weight: 500;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            padding: 2.5rem;
            margin-bottom: 2rem;
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        .game-feature {
            background: linear-gradient(135deg, var(--secondary-green), var(--primary-green));
            color: white;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1rem 0;
            transition: all 0.3s ease;
        }
        .game-feature:hover {
            transform: scale(1.02);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--accent-gold);
        }
        .img-container {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin: 2rem 0;
            transition: all 0.3s ease;
        }
        .img-container:hover {
            transform: scale(1.02);
        }
        .highlight-box {
            background: #e8f5e9;
            border-left: 5px solid var(--secondary-green);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 10px 10px 0;
        }
        .tip-box {
            background: #fff3e0;
            border-left: 5px solid var(--accent-gold);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 10px 10px 0;
        }
        footer {
            background: linear-gradient(135deg, var(--primary-green), #1b5e20);
            color: white;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: var(--secondary-green);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            background: var(--primary-green);
            transform: translateY(-3px);
        }
        .keyword-highlight {
            background: linear-gradient(120deg, transparent 0%, #e8f5e9 50%, transparent 100%);
            padding: 0 5px;
            font-weight: 600;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            .content-section {
                padding: 1.5rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }